On Thu, Feb 01, 2024, Dapeng Mi wrote: > Although the fixed counter 3 and the exclusive pseudo slots events is > not supported by KVM yet, the architectural slots event is supported by > KVM and can be programed on any GP counter. Thus add validation for this > architectural slots event. > > Top-down slots event "counts the total number of available slots for an > unhalted logical processor, and increments by machine-width of the > narrowest pipeline as employed by the Top-down Microarchitecture > Analysis method." So suppose the measured count of slots event would be > always larger than 0. Please translate that into something non-perf folks can understand. I know what a pipeline slot is, and I know a dictionary's definition of "available" is, but I still have no idea what this event actually counts. In other words, I want a precise definition of exactly what constitutes an "available slot", in verbiage that anyone with basic understanding of x86 architectures can follow after reading the whitepaper[*], which is helpful for understanding the concepts, but doesn't crisply explain what this event counts. Examples of when a slot is available vs. unavailable would be extremely helpful. [*] https://www.intel.com/content/www/us/en/docs/vtune-profiler/cookbook/2023-0/top-down-microarchitecture-analysis-method.html
